Shoe-filler.



"Iran STATES PATENT FFICE.

FREDERICK E. WOODWARD, OF LACHINE, QUEBEC, CANADA.

Patented Apr. 20, 1915.

The invention to be hereinafter described" relates to shoe fillers.

The main objects of the invention are to provide a marketable, transportable filler which will be economical in its production and use and will have the following qualities; permanent pliability, durability, waterproofness, elasticity, resiliency, softness and workability, strongly adherent to leather whether wet or dry, tenacious, low melting, quick cooling, rapid setting and stable or non shifting.

At present there are .two classes of fillers on the marketrubber .cement fillers, and groundcork fillers. Neither of these adequately meets the demands. The first is dan- J gerous from fire and is wasteful and expensiv-e because of evaporation, while the second requires a long time to set, involving long and expensive delays in the other steps of manufacture.

Tofully and adequately meet all of the requirements herein-before enumerated the present filler has beeninvented. It comprises the ingredients hereinafter stated, and mixed substantially in the manner and proportions set forth in the following description. Preferably, what will be hereinafter termed the compound, is first made. This compound, which also performs the function of a binder, is then mixed with a base of ground or granulated cork, saw-dust, leather dust, or any suitable substance of like nature.

The preparation of the above filler is as follows:250 lbs. of resin is heated to the melting point in a steam jacketed kettle or other suitable vessel. While it is in a hot fluid state 30 lbs. of Vaseline and 20 lbs. of pine tar are stirred in. The Vaseline acts on the resin to render the resulting mass soft, semi-plastic, flexible, resilient, elastic, non-brittle, pliable, waterproof, stable, tough, tenacious, adhesive, readily workable, low melting, quick cooling, and rapid set- 'ting. The resin alone, upon cooling, would the filler so that it Application filed August 8, 1913. Serial No. 783,794.

become hard and brittle, of course. The pine tar increases the working qualities of will smooth off better and g1ve a neater appearance when molded into the shoe cavity. Also, before mixing in the Vaseline of the compound, 10 lbs. of bicarbonate of soda should be added and thoroughly dissolved. The bi-carbonate of soda makes the resulting filler substantially noninflammable. Into this hot compoundabove described is stirred the base material of granulated cork, saw-dust, leather dust, or other suitable material having thesame general qualities in the proportion of 25 lbs. base to 6 gals. compound. This completes the filler. When allowed to cool it is'ready for use. If desired, it may be put up in loaf form by covering the outside of each loaf with a layer of the base material in well known manner, or it may be put up in bar-- rels or boxes. The heated compound and consequently, the filler containing it, gives ofl a non-inflammable gas, thus substantially preventing combustion of the filler. Thus, in addition to the qualities previously enumerated, this filler has the additional qualities of non-infiammableness and smoothnessand evenness in working when being molded into the cavity.

The ingredients above named are common trade articles and, therefore, vary more or less in purity. Consequently, their proportions will vary somewhat, on that account. Likewise, the requirements of the filler for use in summer are different than the requirements for winter. For that reason, the proportions will be varied. Thus, for winter use, for instance, there would be a greater quantity of vaseline than for summer use.

Obviously, other ingredients having either individually or collectively, similar properties may be used for those specifically mentioned. Many of these are well known on the market and would readily occur to any one skilled in the art to which this im vention relates. Therefore, they need not be set forth here.

Having fully set forth and described my invention, what I claim and desire to protect by Letters Patent of the United States 1s 1. A shoe filler comprising, resin, vaseline, pine tar, bi-carbonate of, soda, and a comminuted resilient solid material.

2. A shoe filler comprising, resin 250 lbs. resilient solid material to 6 gals. of said Vaseline '30 lbs. pine tar-20 lbs. bi-carbonate' mixture.

of soda 10 lbs. and a comminuted resilient Solid materiaL v FREDERICK E. WOODWARD. 5 3, A shoe filler comprising, resin 250 lbs. Witnesses: v

Vaseline 30 lbs. pine tar 20 lbs. bi-carbonate GEORGE H. Onoss,

of soda 10 lbs. and 25.1bsl of comminuted RICHARD E'Woonwm. 

